Added Login validation

Toolkit.Foundation/IValidation.cs

@@ -14,7 +14,10 @@ public interface IValidation :
         ValidationRule[] rules,
         ValidationTrigger trigger = ValidationTrigger.Deferred);
 
-    bool Validate();
+    Task<bool> Validate<TProperty>(Expression<Func<TProperty>> property,
+        ValidationRule[] rules);
 
-    bool Validate(string name);
+    Task<bool> Validate();
+
+    Task<bool> Validate(string name);
 }

Toolkit.Foundation/Validation.cs

@@ -27,7 +27,7 @@ public class Validation(IValidatorCollection validators) :
 
         if (trigger is ValidationTrigger.Immediate)
         {
-            Validate(name);
+            _ = Validate(name);
         }
     }
 
@@ -37,7 +37,28 @@ public class Validation(IValidatorCollection validators) :
         PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(propertyName));
     }
 
-    public bool Validate(string name)
+
+    public async Task<bool> Validate<TProperty>(Expression<Func<TProperty>> property, 
+        ValidationRule[] rules)
+    {
+        string? name = GetPropertyName(property);
+        Validator validator = new(name, rules);
+
+        (bool isValid, string? message) = await validator.TryValidate();
+
+        if (!isValid)
+        {
+            errors[name] = message ?? "";
+        }
+
+        OnPropertyChanged(nameof(Errors), null, null);
+        OnPropertyChanged(nameof(HasErrors), null, null);
+
+        return !HasErrors;
+    }
+
+
+    public async Task<bool> Validate(string name)
     {
         if (Errors.ContainsKey(name))
         {
@@ -48,7 +69,8 @@ public class Validation(IValidatorCollection validators) :
         {
             if (validator is not null)
             {
-                if (!validator.TryValidate(out string? message))
+                (bool isValid, string? message) = await validator.TryValidate();
+                if (!isValid)
                 {
                     errors[name] = message ?? "";
                 }
@@ -61,14 +83,15 @@ public class Validation(IValidatorCollection validators) :
         return !HasErrors;
     }
 
-    public bool Validate()
+    public async Task<bool> Validate()
     {
         errors.Clear();
         foreach (Validator? validator in Validators)
         {
             if (validator.PropertyName is string name)
             {
-                if (!validator.TryValidate(out string? message))
+                (bool isValid, string? message) = await validator.TryValidate();
+                if (!isValid)
                 {
                     errors[name] = message ?? "";
                 }

Toolkit.Foundation/ValidationRule.cs

@@ -2,26 +2,49 @@
 
 public class ValidationRule
 {
-    public ValidationRule(Func<bool> validation,
+    private readonly Func<bool>? syncValidation;
+    private readonly Func<Task<bool>>? asyncValidation;
+
+    public ValidationRule(Func<bool> validation, 
         string message)
     {
-        Validation = validation;
+        syncValidation = validation;
-        Message = new Func<string>(() => message);
+        Message = message;
+    }
+
+    public ValidationRule(Func<Task<bool>> validation,
+        string message)
+    {
+        asyncValidation = validation;
+        Message = message;
     }
 
     public ValidationRule(Func<bool> validation)
     {
-        Validation = validation;
+        syncValidation = validation;
+        Message = "";
     }
 
-    public ValidationRule(Func<bool> validation,
+    public ValidationRule(Func<Task<bool>> validation)
-        Func<string> message)
     {
-        Validation = validation;
+        asyncValidation = validation;
-        Message = message;
+        Message = "";
     }
 
-    public Func<string>? Message { get; }
+    public async Task<bool> ValidateAsync()
+    {
+        if (syncValidation is not null)
+        {
+            return syncValidation();
+        }
 
-    public Func<bool>? Validation { get; }
+        if (asyncValidation is not null)
+        {
+            return await asyncValidation();
+        }
+
+        return false;
+    }
+
+    public string Message { get; }
 }

Toolkit.Foundation/Validator.cs

@@ -1,33 +1,22 @@
-using System.Diagnostics.CodeAnalysis;
+namespace Toolkit.Foundation;
 
-namespace Toolkit.Foundation;
+public class Validator(string propertyName,
-
+    ValidationRule[] rules)
-public class Validator
 {
-    private readonly ValidationRule[] rules = [];
+    private readonly ValidationRule[] rules = rules;
 
-    public Validator(string propertyName,
+    public string? PropertyName { get; } = propertyName;
-        ValidationRule[] rules)
+
+    public async Task<(bool isValid, string? message)> TryValidate()
     {
-        PropertyName = propertyName;
-        this.rules = rules;
-    }
-
-    public string? PropertyName { get; }
-
-    public bool TryValidate([MaybeNull] out string message)
-    {
-        message = "";
-
         foreach (ValidationRule rule in rules)
         {
-            if (rule.Validation?.Invoke() == false)
+            if (!await rule.ValidateAsync())
             {
-                message = rule.Message?.Invoke();
+                return (false, rule.Message);
-                return false;
             }
         }
 
-        return true;
+        return (true, null);
     }
 }

Toolkit.UI.Avalonia/KeyBindingTriggerBehaviour.cs

@@ -12,12 +12,21 @@ public class KeyBindingTriggerBehaviour :
     public static readonly StyledProperty<KeyGesture> GestureProperty =
         AvaloniaProperty.Register<KeyBindingTriggerBehaviour, KeyGesture>(nameof(Gesture));
 
+    public static readonly StyledProperty<bool> IsEnabledProperty =
+        AvaloniaProperty.Register<KeyBindingTriggerBehaviour, bool>(nameof(IsEnabled), true);
+
     public KeyGesture Gesture
     {
         get => GetValue(GestureProperty);
         set => SetValue(GestureProperty, value);
     }
 
+    public bool IsEnabled
+    {
+        get => GetValue(IsEnabledProperty);
+        set => SetValue(IsEnabledProperty, value);
+    }
+
     public event EventHandler? CanExecuteChanged;
 
     protected override void OnAttached()
@@ -38,6 +47,11 @@ public class KeyBindingTriggerBehaviour :
 
     public bool CanExecute(object? parameter) => true;
 
-    public void Execute(object? parameter) =>
+    public void Execute(object? parameter)
-        Interaction.ExecuteActions(AssociatedObject, Actions, null);
+    {
+        if (IsEnabled)
+        {
+            Interaction.ExecuteActions(AssociatedObject, Actions, null);
+        }
+    }
 }